Fabio from Brazil wanted to know a good basic setup for podcasting. I use an Alesis mixer with two Shure microphones and a second laptop all running via USB into a MacBook Pro. Then I upload to Archive.org and use a Wordpress blog combined with Feedburner to publish the RSS feed. Here's a WikiHow on starting a podcast that has some other good ideas and resources.
Your calls:

Can you dual boot OS X Leopard on a Vista machine? Yes. Daily Apps has an excellent guide to doing just that. You'll have to provide your own OS X that works on a PC though. For that, head to the OSX86 project.

Can you run Windows Vista on an Acer Aspire One? Sure. Probably only Vista Basic and it's not going to run like blazes, but if you like to try this kinda stuff, we say go for it.

You can boot from a USB thumbdrive in OS X; even boot Linux if you want. Take a look at this wiki.
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